Even assuming every single missile destroys its target, you only have so many missiles (this ain't Ace Combat where missiles magically respawn on their pylons). If each of your planes has eight missiles, but there are 10 enemy drones for each of your planes, then you're still stuck with a 2:1 dogfight.
One or both adversaries can escape.. it can happen in seconds with two supersonic aircraft.
It's not like a video game where they exist in a modeled world where no one else is around and they both have unlimited fuel and radar works perfectly, etc..
If the two fighters "merge" at 600kts each and keep going they'll be 20 miles apart in 1 minute.
If one of them decides to light the afterburners and accelerates to 1000kts and go supersonic to escape the other one has to turn around and try to accelerate to catch up.
Not easy. The harder the chaser turns around the more speed they'll bleed off, and the more time it will take to reaccelerate. If they turn a wider circle they'll be further away and have more distance to make up.
Meanwhile the plane that has decided to "exit" might have flown into the cover of friend AAA/SAM sites or friendly fighters.
If you start talking about swarms of supersonic drones instead of an enemy fighter then suddenly the drones sound awfully expensive.
> One or both adversaries can escape.. it can happen in seconds with two supersonic aircraft.
Which is mostly useless if the one escaping is in a defending role. Good job saving the aircraft and pilot. Unfortunately your adversary is now clear to proceed to the actual target.
In war, it doesn't just matter which soldier is better. It matters how quickly they can get to where they are going, how many of them you have to field, and whether they are defending or attacking, and whether they can be easily detected while moving. Different attributes have different values in different circumstances, but being able to field an order of magnitude or more covers up a lot of downsides.
What's more powerful, 1000 trained soldiers with combat gear and automatic rifles, or 10,000 conscripted citizens with hunting rifles? It depends on the specific circumstances.
Even in an attacking role, if you're still able to be denied actual air superiority over your target after you run out of missiles (i.e. because you're unwilling or unable to dogfight and clean up the rest of the enemy's air assets), then congrats, mission failed, we'll get 'em next time.
In some cases, yes. How much does stealth help you if you're defending, not attacking? Even if you can empty your payload and retreat without them discerning where you are, how many times can you do that before they've reached their target?